StacktraceTop: __libc_message (do_abort=2, fmt=0x49d080 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189 malloc_printerr (action=<optimized out>, str=<optimized out>, ptr=0x9fff3e0) at malloc.c:6283 _int_free (av=0x4d9400, p=0x9fff3d8) at malloc.c:4795 __GI___libc_free (mem=0x9fff3e0) at malloc.c:3738 _cairo_unscaled_font_reference (unscaled_font=0x9d381b8) at /build/buildd/cairo-1.10.2/src/cairo-font-face.c:287
StacktraceTop: unix/sysv/ linux/libc_ fatal.c: 189 unscaled_ font_reference (unscaled_ font=0x9d381b8) at /build/ buildd/ cairo-1. 10.2/src/ cairo-font- face.c: 287
__libc_message (do_abort=2, fmt=0x49d080 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/
malloc_printerr (action=<optimized out>, str=<optimized out>, ptr=0x9fff3e0) at malloc.c:6283
_int_free (av=0x4d9400, p=0x9fff3d8) at malloc.c:4795
__GI___libc_free (mem=0x9fff3e0) at malloc.c:3738
_cairo_